Steampunk Musha is an alternative setting for Iron Gauntlets that features a Victoriental feudal land, torn between honoring the old traditions and embracing new technologies. It includes all new and original player races, such as clockwork ronin, the half-demon jinteki-oni, keshou (goblin cousins), and the juunishi-p'o (human-spiritual hybrids of the zodiac animals); new gimmicks, backgrounds, and vocations; two new forms of magic; new dueling, melee, and ranged weapons including firearms; and a bestiary that includes dangerous creatures, spirits, and oni.

Steampunk Musha can be used as a base setting for Iron Gauntlets, providing an overview of the world, as well as detailed information for several provinces. Plus, a sample adventure is included to help guide directors. The various elements of the setting offer lots of ideas, making this a very useful playing aid.